A facile and efficient synthesis of substituted quinolin-2(1H)-ones is developed via intramolecular cyclization of penta-2,4-dienamides mediated by concentrated H2SO4 (98%), and a mechanism involving the formation of a dicationic superelectrophile, and subsequent intramolecular nucleophilic cyclization reactions is proposed.
通过浓
硫酸(98%)介导的五-2,4-二烯酰胺的分子内环化反应,开发了一种简便且高效的取代
喹啉-2(1H)-酮合成方法,并提出了一种涉及双阳离子超级亲电试剂形成和随后的分子内亲核环化反应的机制。